This science fair project idea experiments with spinning color wheels and optical illusions.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

What happens when colored beams of light mix? You might be surprised.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this fun activity, your child will create their very own solar oven to bake s'mores!

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.